Gearing.



B. M. W. HANSON.

GEARING. LPPLIGATION nmpn APR. 20. 1909.

Patented Feb. 8, 19 10.

2 SHEETB*BHEET 1.

BL M. W. HANSON GEAEING.

APPLICATION BLED APR. 20, 1909. 9%,69? Patented F9118, 1910.

fmwemfiar: 51M Mamas 3 his Atarneys,

U ITED se s meme earl-tea BENGEI. M. w. HANSON, or imarnoan, CONNECTICUT; .ASSIGNOR r PRATT a WHITNEY COMPANY, or HARTFORD, comvno rrcu'r, .A CORPORATION or NEW JERSEY.

' GEARING.

- T0 all whom it may concern:

Be it known that .I, BENGT M. W. HAN-' soN, a citizen of the United stat' a residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and usefullmprovements in Gearing, of which the following is a specification.

This invention relates to gearing and gearing comprising my invention is su's- 1o ceptible of advantageous use in many difierent connections especially in conjunction with a grinding machine as hereinafter particularlydesorlbed and as shown in the ac- "coi'npanylng drawings. I '15 f In the drawings accompanying and forming part of the present specification I illus- 1 .trate in detail one form of embodiment of the invention which to enable those skilled in theart to practice the invention will be set forth in detail in the following description while the novelty of the invention will V be included in the claims succeeding said description. v 1 Referring-to said drawings, Figure 1 is a 'front elevation of a grinding machine involving driving mechanism including my invention. Fig. 2 1s 'a'rear elevation of the same. -Fig. 3 is a front elevation on a somewhat larger scale of a portion of the driving mechanism,.and, Fig. 4 is a view on a similar scale of the parts shown in said Fig. 3 and as seen from the right in said latter figure.

. Like characters refer to like parts throughout the. several figures.

I shall describe somewhat briefly a grinding machine involving certain known fea'- tures so that it will be more easy to understand the nature of my invention and in Figs. 1 and 2 ofthe drawings appears such v 2. machine which comprises a bed as 2 upon which is mounted for reciprocation longitudinally thereof the work-carriage 3 provided with a head-stock 4 and a tail-stock 5 which'are provided respectively with spindles 6 and 7 between which the worle (not tains a pulley 8'connected through the, in-

tervention of suitable mechanism with said spindle 6 so that when said pulley is rotated the work will be turned. Over the pulley 8 is passed 'a belt 9 connected with an overhead drum 1O thelength of which equals:

approximately the traverse of the carriage so that no matter where said carria e may be it' will be in driving conneetion with said Specification of Letters Patent. A pplicationfiled' April 20, 1909.' Serial No. 491,102.

may be driven by an electric motor.

. Patented net. a; mic.

over-head drum. In connection with said belt is a belt-tightener such as that denoted in a general way by 11. The shaft for the drum. 10 is denoted by 10 and it is. sustained by the bearings or uprights 1 2 and 13 e0 rising from and fastened to the bed 2. The

said drum therefore while over-head is not carried by a shaft separate or independent of the machine but forms an organized part thereof and presents a very effective means for driving or turning the work in that as will be hereinafter apparent the macpin e t is therefore evident that no undue care need be exercised in placing the machine upon the floor of a factory, the only requisite being the relative disposition of the driving motor and the machine itself.-

I have shown as fastened to one end of a belt 15 with a similarly constructed but oppositely disposed pulley 16, fastened tor. the shaft 17 rotatively supported by suitable bearings upon the bed 2 said two cone pulleys and the belt presenting a simple means fordriving the said over-head drum 10 and for also changing the speed thereof.

' The tool-carriage is denoted by 18 and it has a reciprocatory movement upon the up-, per surface of the bed 2 transversely thereof. The grindin wheel is designated by 19 it' being suitably supported by said tool-carriage and being operatively connected with the pulley 20 although the intermediate connections are not shown. Said pulley 20 is so fastened to a'shaft 21 on the carriage 18 and I will hereinafter indicate 'how. said shaft- 21 is driven.

The carriage 3 is reciprocated by connections driven from the shaft 17 but I have not deemed it necessary to describe or show the connections between said shaft 17' and 5 the said work-carriage as the same are so well known. Imight at this point howi ever consider the shaft- 17 a carriage recipshown) s supported. The head stock 4 susi rocating shaft and the shaft 21 a t0ol-turningor driving shaft. Upon one end of sa d tool-driving shaft 21 I have shown fastened a; pulley 22 connected by a belt 22 with the which is adapted to be driven by. a belt 26 exteiidingfrom suitable motor. It will be evident that by means of the stepped cone pulley the speed of the shaft 2 1 may be varied and this variation in speed is What I utilize in the present instance to increase the speed of the grinding wheel 19 when the latter has its working surface worn away said grinding wheel will be increased and although, as will hereinafter appear the carriage reciprocating shaft 17 is driven from said shaft 2%, the speedof the carriage will not be changed the parts being so related that the relative velocities of the parts will remain constant.

The shaft 2st is shown as having fixed to one end thereof the pinion 27 in mesh with a spur-gear 28 both saidgears being incascd in a boxing 29 on the framework of the machine, and said spur gear 28 being fastencd'to a shaft 30 also supported by said framework. To said shaft 30 is also fastened a stepped cone pulley 31 connected by a belt 32 with a stopped pulley the steps of which face oppositely to those of the pulley 31. Owing to the )resencc of the speedreducing gears 27 an 28 I can drive the carriage reciprocating shaft 17 at a relatively slow speed at all times.

Whcn the grinding wheel 19 new the belt 26 will be on the large section oft-he cone pulley 25 while the belt 32 will be on the sn'iall-sectiou of the pulley 33 and the larger step of the pulley 31 by reason of which the grinding Wheel 19 and carriage tlwill be operated at the proper relative speeds. Should the attendant of the machine see the necessity of speeding up said grinding wheel he will shift the belt 26 onto the smaller section of th e pulley 25 and Simultancously shift the belt from the smaller section of the pulley 33 and naturally at the same time from the larger step of the pulley 3]. onto the smaller step thereof and although the speed of the shaft 24: is increased the speed of the shaft 17 will not he. I provide means whereby it will be-impossible to shift one of said belts 26 and 32 without simultaneously shifting the-other although as will hereinafter appear the belt itilias a n'iovcment while thebclt 32 is at rest, this being due simply to the fact that the belt 26 is somewhat widen than the belt 3. I should state at this point that in 2 and 3 the belts are shown as occupylug their shifted positions and also that with the exception of Fig. .l,

a portion of the belt 26 in be all the ts are represented for clearness, by dotted lines. The belt shifting mechanism is best shown in the enlarged F1g's. 3 and .4: and. the same comprises a shifter rod 34 which with its adjuncts is shown in, Fig. 3, as occupying its two extreme positions by dotted and full lines, the full line position of said shifter rod being what has been considered as the shifted po sition thereof. 1, Said rod is supported by suitable hearings on the framework of the 'machine and it has a s lined connection as 35 therewith so that sai rod cannot turn as it is slid back and forth. Said rod 34; is shown as equipped with two forks 36 and 37 the fork 36 being somewhat wider than the "belt 32. It is therefore clear that one of said belts (26and'32) cannot be shifted without shifting the other although the fork 37 has some lost motion caused by the difference in width'of the two belts. The fork 37 by abutting against the framework limits'the movement of the rod 34 in one direction 1- while the stop 38 limits the movement of said rod in'the opposite direction. By the construction described nothing is left to chance which might be the case were thecrating device, a carriagc-reciprocating de-m vice, and mechanism for operating said devices said mechanism involving means for increasing the speed. of the tool-driving'qdevico and for positively preventing an iir crease in speed of the carriage-reciprocating device when the speedof the tool-driving device is thus increased. In the present instance as will be obvious the speed of the carriage or table therefor-cremains cbnstant fllithl y the organization pst. outlined it will be impossible for the perator of the machine to change the speed of the reciprocator-y carriage or table. o

H. v. .lhcre are certain features of a landing machine shownand d escribcd but not claimed herein, they being made' the basis of a. copcnding application filed September 2,

1909, Serial No. 515,907.

What I claim "is: 3 l. The combination of a shaft, a stepped cone pulley on said shaft, a'second shaft, a stepped cone pulley on said second shaft,

a pinion fastened to said first shaft, a spur-v gear in mesh with said pinion and fastened to said second shaft, a carriage reciprocating shaft, a stepped cone pulley on said carriagereciprocatingshaft, adapted .to be. belted to said second-mentioned cone pulley, a tool-operating shaft, pulleys on said firstcease? mentioned shaft and said tooloperating shaft, adapted to be belted to each other, standards rising from the framework, a drum, a shaft rotatively sup orted by said standards and carrying said rum and pulleys connected With said drum shaft and carriage-reciprocating shaft, adapted to be belted to each other.

2. The combination of a shaftfa steppedcone pulley on said shaft, a second shaft, a cone pulley on said second shaft, said cone pulleys bein adapted to receive separate and distinct elts, operative connections between said shafts, and mechanism for positively simultaneously shifting the belts which are adapted to run on said cone pulleys, from one step to another thereon.

3. The combination of a shaft, a stepped cone pulley on said shaft, apinionon said shaft, :1 second shaft, a spur gear on said second shaft, in mesh with said pinion, a stepped cone pulley on said second shaft, said pulleys bein adapted to receive separate and distinct ielts, and means for causing positively simultaneously the shifting of the belts which are adapted to run on said cone thereon.

4. The combination of a shaft, a stepped cone pulley on said shaft, a pinion also on said shaft, a second shaft, a spur gear on said second shaft, in mesh with said pinion, a stepped cone pulley on said second shaft, said pulleys being adapted to receive separate and distinct belts, and a slidahle nonrotative, belt-shifting rod having forks to receivethe belts which run on said pulleys pulleys, from one step to another and that are adapted to simultaneously shift said belts, from one step to another of. the respective cone pulleys.

5.- The combination of a shaft, a stepped cone pulley on said shaft, a second shaft, a stepped cone pulley on said second shaft, said pulleys bein adapted to receive separate and distinct elts, speed-reducing gearing between said shafts, means for causing positively the simultaneous shifting of said belts from one step to another of-the respec tive cone pulle s, a carriage-reciprocating shaft, a steppe cone pulley on said carriage-reciprocating shaft ada ted to be belt ed to said second mentione stepped cone pulley, a tool-operating shaft, and operative connections between said first-mentioned shaft and said tool-operatin shaft.

- 6. The combination of a siaft, a stepped cone pulley on said. shaft, a second shaft, a stepped cone pulley on said second shaft, said cone pulleys being adapted to receive separate and distinct belts, speed-reducing gearing between said shafts, means for caus ing positively the simultaneously shifting of the belts Which run on said cone pulleys from one step to another, respectively thereof, acarriage-reciprocating shaft, a stepped cone pulley on said carriage reciproeating;- shaft, adapted to be belted to SEHd -SEECOIIC i mentioned cone pulley, a tool operating shaft, pulleys on said tool-operating shaft and said first-mentioned shaft, adapted to be belted to each other, an overhead drum, a shaft for said drum, and stepped cone pulleys on said drum shaft and carriage reciprocating shaft, adapted to be belted to each other.

In testimony whereof I afiix my signature in presence of two witnesses.

BENGT M. W. HANSON.

Witnesses:

W. M. Sronns, N. H. MILLER. 

